Grinder.



No. 669,932. Pa'tentqd Mar. I2, 190].

-J. G. MAYES QLH. F. KING. GRINDER.

(Application filed July 28, 1900. (No Model.) 2 Sheets-Shout I.

5| M van row:

witnesses Patented Mar. I2, l90l.

J. G. MAYES &. H. F. KING.

G R I N D E R Application. filed July 28, 1900.

2 Sheets-Sheet 2.

(No ModelJ JOHN G. MAYES AND HARVEY F. KING, OF HAZEN, PENNSYLVANIA.

GRINDER.

SPECIFICATION forming part of Letters Patent N 0. 669,932, dated March 12, 1901.

Application fil d July 28, 1900. $erial No. 25,196- (No model.)

To aZZ whom, it may concern.

Be it known that we, JOHN G. MAYES and HARVEY F. KINe,citizens of the United States, residing at Hazen, in the county of Jefferson and State of Pennsylvania, have invented new and useful Improvements in Grinders, of which the following is a specification.

Our invention relates to grinding devices designed for grinding the calks and toes of horses shoes, the object being to provide a simple and effective device of this character.

which is adapted to be applied to a horses foot, so that the calk of a horses shoe may be sharpened without removing the shoe from the foot.

The construction of the improvement will be fully described hereinafter in connection with the accompanying drawings, which form a part of this specification, and its novel features will be defined in the appended claims.

In the drawings, Figure 1 is a side elevation of a grinding device embodying the invention. Fig. 2 is a plan view of the same. Fig. 3 is a central longitudinal section of the device. Fig. 4 is a transverse vertical section thereof. Fig. 5 is a view in perspective of the supporting-frame of the grinder. Fig. 6 is a detail perspective view of the pivotal support of the frame, and Fig. 7 is a perspective view of the coupling which connects the frame to its pivotal support.

The reference-numeral 1 designates the securing-plate for the device, formed at one end with a depending hook or flange 2 and having a longitudinal elongated slot 3 at about its center and a second slot 4 adjacent to one end of the plate. Through the slot 4 extends a pin 5, on which is fulcrumed a cam-lever 6, having its face 7 roughened or serrated. The pin 5 is provided with clamping-nuts 8 and 9 and a washer 10, by means of which the pin is held adjustably within the slot 4.

l1 designates a block recessed at its upper end to form ears 12 and provided at its lower end with a depending lug 13, from which projects athreaded pin 14. The lug 13 fits within the slot 3, and it is held adjustably within the slot by means of a nut 15 and a washer 16.

17 designates the frame of the device which supports the operative mechanism, one end of said frame comprising a curved arm 18, formed with a bearing 19. The opposite end of the frame is recessed to form parallel arms 20, which are also provided with bearings 21, within which is mounted a shaft 22, and upon this shaft is fixed a grinding-roller 23. Upon the end of {the shaft 22 which projects beyond the frame is mounted a gear-pinion 24, meshing with a gear-wheel 25, mounted upon a stud 26, upon which is also mounted a pinion 27, which is concentric with the gearwheel 25 and meshes with the driving gearwheel 28, mounted upon a stud 29, supported in a bearing 19 of the frame. wheel 28 is provided with a crank 30, by means of which said wheel is revolved to receive the grinding-roller from the train of gearing described. The grinding-roller 23 may be of the form shown in the drawings, tapering from the center to its ends, or it may be of cylindrical form, and it has a grindingsurface of emery or other abrasive material.

The frame 17 is secured to the block 11 by means of a coupling-block 31, from the upper side of which projects a threaded pin 32, which extends through an opening in the frame 17 and is held byanut 33. Depeddifig from the coupling-block 31 is a perforated lug 3 1, which extends down between the ears 12 of the block 11 and is pivotally secured thereto by a thumb-screw 35.

The utility and operation of the device constructed as thus described will be readilyunderstood. The hook or flange 2 of the securing-plate is adapted to engage one side of the horses shoe, the latter being shown in dotted lines in Fig. 1, and the opposite end of the plate 1 is clamped against the opposite side of the shoe and hoof by means of the camlever 6, the fulcrum of the latter being adjustable to adapt it to variations in sizes of the shoes. When the plate is thus secured to the horses hoof, the emery-wheel may be brought into grinding contact with either the heel or toe calks of the shoe, as the frame by reason of its pivotal connection with the coupling-block 31 may be rotated thereon, so that both the heel and toe portions of the shoe may be operated upon without disengaging the securing-plate 1.

We claim 1. A grinding device comprising a plate adapted to be secured to a horses hoof; means for clamping said plate in position; a frame The gearported upon said coupling and formed at one end with parallel arms, and at its opposite end with an upwardly-curved arm; a revolulole grinder carried by said frame; and a train of gearing mounted upon the frame for revolving said grinder.

In testimony whereof we afiix our signa- 2o tures in presence of two witnesses.

JOHN G. MAYES. HARVEY F. KING. Witnesses:

J. R. EMERY, W. H. LUoAs. 

